Commit Graph

15911 Commits

Author SHA1 Message Date
John W. Linville
79d38f7d6c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Conflicts:
	drivers/net/wireless/iwlwifi/pcie/tx.c
2012-11-28 10:56:03 -05:00
Christian Lamparter
725d255e70 p54: improve TSF timestamp precision
The LMAC API states that the TSF clock value of
every rx'ed frame is a "usec accurate timestamp
of the hardware clock at the end of frame
(before OFDM SIFS EOF padding)".

Signed-off-by: Christian Lamparter <chunkeey@googlemail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-26 14:54:21 -05:00
Johannes Berg
1d815ef4b8 iwlwifi: initialize rx_status
The vendor radiotap patch added a few fields to
struct ieee80211_rx_status that need to be zero,
initialize the struct instead of using whatever
was left on the stack.

Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Tested-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-26 14:54:21 -05:00
Johannes Berg
d369167f0a iwlegacy: initialize rx_status
The vendor radiotap patch added a few fields to
struct ieee80211_rx_status that need to be zero,
initialize the struct instead of using whatever
was left on the stack.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-26 14:54:20 -05:00
Joe Perches
fbbdcc0213 brcmsmac: Add __printf verification to logging prototypes
Adding __printf helps spot format and argument mismatches.

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-26 14:54:20 -05:00
John W. Linville
62c8003ecb Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2012-11-26 14:46:41 -05:00
Johannes Berg
a3ad5c3dd5 mac80211_hwsim: remove printing scan config
The frequencies will be printed when actually
doing the scan, and the IEs can be captured
on the hwsim0 monitor.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:47:57 +01:00
Johannes Berg
b296005c00 mac80211_hwsim: advertise VHT support
If the number of channels is > 1, which means that
hwsim will use mac80211 channel contexts, it can
also advertise VHT support.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:43:00 +01:00
Johannes Berg
4bf88530be mac80211: convert to channel definition struct
Convert mac80211 (and where necessary, some drivers a
little bit) to the new channel definition struct.

This will allow extending mac80211 for VHT, which is
currently restricted to channel contexts since there
are no drivers using that which makes it easier. As
I also don't care about VHT for drivers not using the
channel context API, I won't convert the previous API
to VHT support.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:42:59 +01:00
Johannes Berg
3d9d1d6656 nl80211/cfg80211: support VHT channel configuration
Change nl80211 to support specifying a VHT (or HT)
using the control channel frequency (as before) and
new attributes for the channel width and first and
second center frequency. The old channel type is of
course still supported for HT.

Also change the cfg80211 channel definition struct
to support these by adding the relevant fields to
it (and removing the _type field.)

This also adds new helper functions:
 - cfg80211_chandef_create to create a channel def
   struct given the control channel and channel type,
 - cfg80211_chandef_identical to check if two channel
   definitions are identical
 - cfg80211_chandef_compatible to check if the given
   channel definitions are compatible, and return the
   wider of the two

This isn't entirely complete, but that doesn't matter
until we have a driver using it. In particular, it's
missing
 - regulatory checks on the usable bandwidth (if that
   even makes sense)
 - regulatory TX power (database can't deal with it)
 - a proper channel compatibility calculation for the
   new channel types

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:42:59 +01:00
Johannes Berg
683b6d3b31 cfg80211: pass a channel definition struct
Instead of passing a channel pointer and channel type
to all functions and driver methods, pass a new channel
definition struct. Right now, this struct contains just
the control channel and channel type, but for VHT this
will change.

Also, add a small inline cfg80211_get_chandef_type() so
that drivers don't need to use the _type field of the
new structure all the time, which will change.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:42:58 +01:00
Johannes Berg
42d97a599e cfg80211: remove remain-on-channel channel type
As mwifiex (and mac80211 in the software case) are the
only drivers actually implementing remain-on-channel
with channel type, userspace can't be relying on it.
This is the case, as it's used only for P2P operations
right now.

Rather than adding a flag to tell userspace whether or
not it can actually rely on it, simplify all the code
by removing the ability to use different channel types.
Leave only the validation of the attribute, so that if
we extend it again later (with the needed capability
flag), it can't break userspace sending invalid data.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-26 12:42:58 +01:00
David S. Miller
24bc518a68 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/wireless/iwlwifi/pcie/tx.c

Minor iwlwifi conflict in TX queue disabling between 'net', which
removed a bogus warning, and 'net-next' which added some status
register poking code.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-25 12:49:17 -05:00
John W. Linville
e4cb3ff931 rtl8723ae: fix build break from "mac80211: support RX_FLAG_MACTIME_END"
CC      drivers/net/wireless/rtlwifi/rtl8723ae/trx.o
drivers/net/wireless/rtlwifi/rtl8723ae/trx.c: In function ‘rtl8723ae_rx_query_desc’:
drivers/net/wireless/rtlwifi/rtl8723ae/trx.c:324:21: error: ‘RX_FLAG_MACTIME_MPDU’ undeclared (first use in this function)
drivers/net/wireless/rtlwifi/rtl8723ae/trx.c:324:21: note: each undeclared identifier is reported only once for each function it appears in
make[3]: *** [drivers/net/wireless/rtlwifi/rtl8723ae/trx.o] Error 1

Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 15:05:05 -05:00
John W. Linville
75c8ec71fb Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next 2012-11-21 14:43:51 -05:00
John W. Linville
1e60896fe0 Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/iwlwifi/iwlwifi-next
Conflicts:
	drivers/net/wireless/iwlwifi/pcie/trans.c
2012-11-21 14:38:49 -05:00
Seth Forshee
ad66786718 brcmsmac: Remove stray argument from debug macro
One of the debug macro invocations ended up with a stray 0 argument
where the format string should be. Remove it.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:05 -05:00
Seth Forshee
6940c9bed1 brcmsmac: Remove unused wlc_prio2prec_map and _BRCMS_PREC_* constants
Fixes sparse warning:
drivers/net/wireless/brcm80211/brcmsmac/main.c:308:10: sparse: symbol 'wlc_prio2prec_map' was not declared. Should it be static?

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:04 -05:00
Sujith Manoharan
580bdac386 ath9k: Remove 'stations' debugfs file
The 'stations' debugfs file has multiple issues. It doesn't scale
to an arbitrary number of associated stations and allocating
64K is not elegant either. Now that changes have been made in
mac80211 to support dynamic creation/deletion of driver-specific
debugfs files on station addition/removal, remove this file and
make use of the mac80211 hooks (which will be done in a sebsequent
patch).

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:04 -05:00
Sujith Manoharan
4d28f771ff ath9k: Fix rate control debugging
Update the rate statistics only when debugfs has been enabled
in ath9k and mac80211 and move the stat() functions under proper
conditionals.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:04 -05:00
Sujith Manoharan
1c11e10b6a ath9k: Fill remove_sta_debugfs() callback
Remove the rate control statistics debugfs file properly
via remove_sta_debugfs(). Also, check for both MAC80211_DEBUGFS
and ATH9K_DEBUGFS config options.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:04 -05:00
Sujith Manoharan
c0b74876ee ath9k: Add a debugfs file to dump queue statistics
Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:03 -05:00
Sujith Manoharan
78ef731ce5 ath9k: Fix the 'xmit' debugfs file
The 'xmit' debugfs file has become big and unwieldy, fix
multiple issues with its usage:

* Store TX counters/statistics only for the 4 Access Categories.
  Use IEEE80211_NUM_ACS instead of ATH9K_NUM_TX_QUEUES.

* Move various utility macros to debug.h, they can be reused
  elsewhere.

* Remove tx_complete_poll_work_seen.

* Remove code that accesses various internal queue-specific
  variables without any locking whatsoever. HW/SW queue details
  will be handled in a subsequent patch.

* Do not print internal values like txq_headidx and txq_headidx.
  They were mostly unused anyway, considering code like:
  PRX("txq_tailidx:     ", txq_headidx);

* Handle 'txprocdesc' for EDMA too.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:03 -05:00
Sujith Manoharan
bea843c738 ath9k/ath9k_htc: Remove WME macros
Use the macros provided by mac80211 and remove redundant
declarations inside the drivers.

Signed-off-by: Sujith Manoharan <c_manoha@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:02 -05:00
Stanislav Yakovlev
067293876e net/wireless: ipw2200: introduce ipw_set_geo function
Move regulatory domain initialization code to a separate function.

Signed-off-by: Stanislav Yakovlev <stas.yakovlev@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:02 -05:00
Rajkumar Manoharan
2884561a64 ath9k: stomp audio profiles on weak signal strength
On lower WLAN signal strength, WLAN downlink traffic might suffer
from retransmissions. At the mean time, playing SCO/A2DP profiles
is affecting WLAN stability. In such scenario, by stomping SCO/A2DP
BT traffic completely for a BTCOEX period, gives WLAN traffic an
oppertunity to recover PHY rate. It also improves WLAN stability at
lower RSSI without sacificing BT traffic.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:01 -05:00
Rajkumar Manoharan
b88083bfb3 ath9k: Fix MCI reset in BT cal_req
This patch reverts the commit "ath9k_hw: Wait BT calibration to complete"
and bail out from MCI interrupt routine for chip reset. The above commit
stalls the WLAN TCP traffic while bringing up and down the BT interface
iteratively. Fixing this properly by queueing up chip reset and bailing
out properly from tasklet routine.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:01 -05:00
Rajkumar Manoharan
ca90ef443c ath9k: Process FATAL interrupts at first
FATAL and WATCHDOG interrupts should be processed first followed
by others.

Signed-off-by: Rajkumar Manoharan <rmanohar@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-21 14:16:01 -05:00
John W. Linville
b311749477 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless
Conflicts:
	drivers/net/wireless/brcm80211/brcmfmac/wl_cfg80211.c
	drivers/net/wireless/iwlwifi/pcie/tx.c
2012-11-21 12:57:56 -05:00
John W. Linville
f30a944392 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless into for-davem
John W. Linville says:

====================
This is a batch of fixes intended for 3.7...

Included are two pulls.  Regarding the mac80211 tree, Johannes says:

"Please pull my mac80211.git tree (see below) to get two more fixes for
3.7. Both fix regressions introduced *before* this cycle that weren't
noticed until now, one for IBSS not cleaning up properly and the other
to add back the "wireless" sysfs directory for Fedora's startup scripts."

Regarding the iwlwifi tree, Johannes says:

"Please also pull my iwlwifi.git tree, I have two fixes: one to remove a
spurious warning that can actually trigger in legitimate situations, and
the other to fix a regression from when monitor mode was changed to use
the "sniffer" firmware mode."

Also included is an nfc tree pull.  Samuel says:

"We mostly have pn533 fixes here, 2 memory leaks and an early unlocking fix.
Moreover, we also have an LLCP adapter linked list insertion fix."

On top of that, a few more bits...  Albert Pool adds a USB ID
to rtlwifi.  Bing Zhao provides two mwifiex fixes -- one to fix
a system hang during a command timeout, and the other to properly
report a suspend error to the MMC core.  Finally, Sujith Manoharan
fixes a thinko that would trigger an ath9k hang during device reset.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-11-21 11:48:31 -05:00
Emmanuel Grumbach
eea54c8ec9 iwlwifi: remove effectless assignment
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2012-11-21 11:30:39 +01:00
John W. Linville
e2ff049840 brcmfmac: include linux/vmalloc.h from usb.c
This avoids build failures on some architectures...

Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
2012-11-20 14:11:37 -05:00
John W. Linville
5b15d0f449 brcmfmac: check return from kzalloc in brcmf_fweh_process_event
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
2012-11-20 14:08:30 -05:00
Seth Forshee
9242c7261b brcmsmac: Remove some noisy and uninformative debug messages
These messages clutter up the trace buffer without adding any useful
information.

Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:08:19 -05:00
Seth Forshee
0c9a0a1dd1 brcmsmac: Add tracepoint for AMPDU session information
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:08:06 -05:00
Seth Forshee
e3c0d8a6f6 brcmsmac: Add tracepoint for macintstatus
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:07:52 -05:00
Seth Forshee
cdf4352f5c brcmsmac: Improve tx trace and debug support
Add the brcmsmac_tx trace system for tx debugging. Existing code to dump
tx status and descriptors are converted to using tracepoints, allowing
for more efficient collection and post-processing of this data. These
tracepoints are placed to collect data for all tx frames instead of only
on errors. Logging of tx errors is also improved.

Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:07:38 -05:00
Seth Forshee
5211fa2c48 brcmsmac: Add brcms_dbg_ht() debug macro
Also convert relevant messages to use this macro.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:07:25 -05:00
Seth Forshee
90123e045c brcmsmac: Add brcms_dbg_dma() debug macro
Also convert relevant messages to use this macro.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:07:12 -05:00
Seth Forshee
229a41d9d0 brcmsmac: Add brcms_dbg_int() debug macro
Also convert relevant message to use this macro.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:06:57 -05:00
Seth Forshee
5ce58bb5f9 brcmsmac: Add rx and tx debug macros
Also convert relevant messages over to use thses macros.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:06:44 -05:00
Seth Forshee
913911f47b brcmsmac: Add brcms_dbg_mac80211() debug macro
This macro is used for messages related to the 802.11 MAC layer.
Relevant messages are also converted to use this macro.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:06:31 -05:00
Seth Forshee
b353dda485 brcmsmac: Use debug macros for general error and debug statements
Convert most uses of wiphy_* and pr_* for general error and debug
messages to use the internal debug macros instead. Most code used only
for initialization still use wiphy_err(), as well as some locations
which are executed too early to use the debug macros. Some debug
messages which are redundant or not useful are removed.

Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:06:16 -05:00
Seth Forshee
269de12bf1 brcmsmac: Add support for writing debug messages to the trace buffer
Add a new brcmsmac_msg trace system to enable writing of debug messages
to the trace buffer, and add brcms_* macros for storing device debug
messages in the trace buffer in addition to the printk log buffer.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:06:03 -05:00
Seth Forshee
b03417443c brcmsmac: Add module parameter for setting the debug level
The debug level can be set by passing debug=... to brcmsmac whenever
CONFIG_BRCMDBG is enabled.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:05:50 -05:00
Seth Forshee
1ca47e687a brcm80211: Convert log message levels to debug levels
In preparation for enhancements to debug and trace support, convert the
message levels to debug levels which will be used for enabling
categories of debug messages. The two message levels are little-used
anyway and are combined into the BRCM_DL_INFO debug level.

Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:05:37 -05:00
Seth Forshee
f5c4f10852 brcm80211: Allow trace support to be enabled separately from debug
Since the runtime overhead of trace support is small when tracing is
disabled, users may be interested in turning on trace support while
leaving other debug features off. Add a new config option named
CONFIG_BRCM_TRACING for this purpose.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:05:22 -05:00
Seth Forshee
75be3e24ee brcmsmac: Reduce number of entries in tx DMA rings
Currently up to 256 frames can be queued for each DMA ring. This is
excessive, and now that we have better flow control we can get by with
less. Experimentation has shown 64 to work well.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:05:08 -05:00
Seth Forshee
b05618deb4 brcmsmac: Use correct descriptor count when calculating next rx descriptor
nextrxd() is calling txd(), which means that the tx descriptor count is
used to determine when to wrap for determining the next ring buffer
entry. This has worked so far since the driver has been using the same
number of rx and tx descriptors, but it's obviously going to be a
problem if different numbers of descriptors are used.

Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:04:51 -05:00
Seth Forshee
e041f65d5f brcmsmac: Remove internal tx queue
The brcmsmac internal tx buffering is problematic. The amount of
buffering is excessive (228 packets in addition to the 256 slots in each
DMA ring), and frames may be dropped due to a lack of flow control.

This patch reworks the transmit code path to remove the internal
buffering. Frames are immediately handed off to the DMA support rather
than passing through an intermediate queue. Non-aggregate frames are
queued immediately into the tx rings, and aggregate frames are queued
temporarily in an AMPDU session until ready for transmit.

Transmit flow control is also added to avoid dropping packets when the
tx rings are full. Conceptually this is a separate change, but it's
included in this commit because removing the tx queue without adding
flow control could cause significant problems.

Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Arend van Spriel <arend@broadcom.com>
Tested-by: Daniel Wagner <wagi@monom.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2012-11-20 14:04:23 -05:00